CN211234922U - Fatigue strength testing device - Google Patents
Fatigue strength testing device Download PDFInfo
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- CN211234922U CN211234922U CN201821248361.8U CN201821248361U CN211234922U CN 211234922 U CN211234922 U CN 211234922U CN 201821248361 U CN201821248361 U CN 201821248361U CN 211234922 U CN211234922 U CN 211234922U
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- tight pulley
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Abstract
The application discloses fatigue strength testing arrangement, including first tight pulley of synchronous pivoted and second tight pulley, first tight pulley is provided with the gear, gear and rack toothing, the slider fixed connection of rack and slider-crank mechanism, be provided with the certain distance between first tight pulley and the second tight pulley, first tight pulley is the same with second tight pulley height, drive rack reciprocating motion through slider-crank mechanism, the rack drives the reciprocal rotation of gear, thereby drive first tight pulley reciprocal rotation, the synchronous reciprocal rotation of second tight pulley and first tight pulley, pass through wire rope with the both ends of compensation chain and fix respectively on first tight pulley and second tight pulley, along with the rotation of first tight pulley and second tight pulley, the flexion of compensation chain constantly changes, thereby carry out the fatigue strength test to the compensation chain.
Description
Technical Field
The utility model relates to a test fixture field especially relates to a fatigue strength testing arrangement.
Background
When the hoisting height of the car elevator exceeds 30 m, a compensating chain is needed between the counterweight and the car frame. When the elevator is on the top floor, the steel wire rope is on the counterweight side, and the weight of the steel wire rope is increased on the counterweight side; when the elevator is at the bottom floor, the wire ropes are on the car side, which adds to the weight of the wire ropes. Because the steel wire rope has weight, the steel wire rope can generate dynamic unbalance along with the continuous up-and-down motion of the elevator, so the fall can be balanced by adopting the compensation chain to compensate the weight of the steel wire rope, and the elevator can run stably. In the running process of the elevator, two ends of the elevator can be continuously raised or lowered, the compensation chain can have a bent part, and the bending times of the compensation chain are required to be tested when the compensation chain is produced so as to meet the requirement of fatigue strength.
SUMMERY OF THE UTILITY MODEL
It is desirable to provide a fatigue strength testing device that tests the bending strength of a compensating chain.
In a first aspect, the utility model discloses a fatigue strength testing arrangement, including synchronous pivoted first tight pulley and second tight pulley, first tight pulley is provided with the gear, and wheel and rack toothing, rack and slider fixed connection of slider-crank mechanism are provided with the certain distance between first tight pulley and the second tight pulley, and first tight pulley is the same with second tight pulley height.
According to the technical scheme that this application embodiment provided, drive rack reciprocating motion through slider-crank mechanism, the rack drives gear reciprocating rotation, thereby drive first tight pulley reciprocating rotation, second tight pulley and the synchronous reciprocating rotation of first tight pulley, pass through wire rope with the both ends of compensation chain and fix respectively on first tight pulley and second tight pulley, along with the rotation of first tight pulley and second tight pulley, the flexion of compensation chain constantly changes, thereby carry out the fatigue strength test to the compensation chain.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural view of a fatigue strength testing apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural view of the mutual matching between the slider-crank mechanism and the guide rail of the fatigue strength testing apparatus according to the embodiment of the present invention;
fig. 3 is a schematic structural diagram of the slider-crank mechanism, the guide rail, the rack, and the gear of the fatigue strength testing apparatus according to the embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 to 3, the fatigue strength testing apparatus of the present invention includes a first fixed wheel 10 and a second fixed wheel 20 which rotate synchronously, the first fixed wheel 10 is provided with a gear 11, the gear 11 is engaged with a rack 12, the rack 12 is fixedly connected with a slider 33 of a slider-crank mechanism, a certain distance is provided between the first fixed wheel 10 and the second fixed wheel 20, and the first fixed wheel 10 is the same as the second fixed wheel 20 in height.
The utility model discloses an in the embodiment, drive rack reciprocating motion through slider-crank mechanism, the rack drives gear reciprocating rotation to drive first tight pulley reciprocating rotation, the synchronous reciprocating rotation of second tight pulley and first tight pulley, pass through wire rope with the both ends of compensation chain and fix respectively on first tight pulley and second tight pulley, along with the rotation of first tight pulley and second tight pulley, the flexion of compensation chain constantly changes, thereby carries out the fatigue strength test to the compensation chain. When guaranteeing first tight pulley and second tight pulley at the distance of horizontal direction regularly, first tight pulley is the same with the second tight pulley height for distance diminishes between first tight pulley and the second tight pulley, can reduce the length of transmission structure between first tight pulley and the second tight pulley, has practiced thrift the material.
Can pass through the motion of motor drive slider-crank mechanism to the motor only needs the motion of one-way drive slider-crank mechanism, the motor need not change the rotation direction, can the energy saving, improves the efficiency of compensation chain fatigue strength test.
Further, the device comprises a first fixing frame 40, wherein the first fixing frame 40 is fixedly connected with a guide rail 41, and the sliding block 33 is in sliding fit with the guide rail 41.
The utility model discloses an in the embodiment, through the direction of motion of guide rail guide slider for the slider is at certain limit motion, and slider and guide rail sliding fit have reduced the friction between slider and the guide rail, have improved the life of slider.
Further, the slider-crank mechanism comprises a rotating wheel 31, the rotating wheel 31 is rotatably connected with a connecting rod 32, the connecting rod 32 is rotatably connected with a slider 33, and the first fixing frame 40 is rotatably connected with the rotating wheel 31.
The utility model discloses an in the embodiment, can rotate the wheel through motor drive and rotate, and the motor only need drive to rotate the wheel and rotate to a direction, the motor need not change the rotation direction, just can drive first tight pulley and second tight pulley and make a round trip to rotate, it is concrete, first tight pulley and second tight pulley can corotation a period earlier, then the reversal a period again, so circulate, drive the motion at the crooked position of compensation chain, thereby reach the purpose of test compensation chain fatigue strength, can the energy saving, improve the efficiency of compensation chain fatigue strength test.
Further, a rack 12 is fixed on the side of the slide block 33 opposite to the guide rail 41.
The utility model discloses an in the embodiment, one side that the slider leaned on the back to the guide rail is fixed with the rack, and the installation of the gear of being convenient for has improved fatigue strength testing arrangement's assembly efficiency.
Further, the wheel groove of the first fixed wheel 10 is detachably and fixedly connected with a first steel wire rope, and the wheel groove of the second fixed wheel 20 is detachably and fixedly connected with a second steel wire rope.
The utility model discloses an in the embodiment, the first wire rope of race detachably fixedly connected with of first tight pulley, through fixing first wire rope's one end at the race of first tight pulley, first wire rope's the other end is fixed with the compensation chain, when first tight pulley rotates, can twine first wire rope on first tight pulley to change the distance between compensation chain and the first tight pulley. The race detachably fixedly connected with second wire rope of second tight pulley, through fixing the race of second wire rope's one end at the second tight pulley, second wire rope's the other end is fixed with the compensation chain, when the second tight pulley rotates, can twine second wire rope on the second tight pulley to change the distance between compensation chain and the second tight pulley. Under the driving of the first fixed wheel and the second fixed wheel which continuously rotate, the test of the bending fatigue strength of the compensating chain is realized.
Further, the race spiro union of first fixed pulley 10 has first fastening bolt, and first fastening bolt joint has first wire rope's one end, and the race spiro union of second fixed pulley 20 has second fastening bolt, and second fastening bolt joint has second wire rope's one end.
The utility model discloses an in the embodiment, the race spiro union of first tight pulley has first fastening bolt, and first fastening bolt joint has first wire rope's one end, and the convenience is dismantled and is installed first wire rope, when first wire rope damages, can carry out quick replacement. The race spiro union of second tight pulley has second fastening bolt, and second fastening bolt joint has second wire rope's one end, conveniently dismantles second wire rope and installs, when second wire rope damaged, can carry out quick replacement.
Further, a first pulley 61 is arranged below the first fixed pulley 10, a vertical projection of the first pulley 61 and the first fixed pulley 10 has an overlapping portion, a second pulley 62 is arranged below the second fixed pulley 20, and a vertical projection of the second pulley 62 and the second fixed pulley 20 has an overlapping portion.
The utility model discloses an in the embodiment, first wire rope can be walked around first pulley then fixed compensation chain, and second wire rope can be walked around second pulley then fixed compensation chain, and first pulley and second pulley can be avoided rotating the in-process at first tight pulley, and the compensation chain produces and excessively rocks, has improved the accuracy of fatigue strength test result.
Further, a third pulley 63 is arranged below the first pulley 61, the vertical projection of the first pulley 61 and the third pulley 63 has an overlapping portion, a fourth pulley 64 is arranged below the second pulley 62, and the vertical projection of the second pulley 62 and the fourth pulley 64 has an overlapping portion.
The utility model discloses an in the embodiment, through the cooperation of first pulley and third pulley, the cooperation of second pulley and fourth pulley can further reduce the compensation chain and produce the rocking that influences the test result in the testing process, has improved the accuracy of fatigue strength test result.
Further, the second fixing frame 50 is included, the second fixing frame 50 is provided with a plurality of fixing holes 51, the distances between the plurality of fixing holes 51 and the third pulley 63 are different, and the fourth pulley 64 is detachably and fixedly connected with the fixing holes 51.
The utility model discloses an in the embodiment, can confirm fourth pulley and which fixed orifices fixed connection according to the actual conditions of compensation chain, improve fatigue strength testing arrangement's suitability. And, the fourth pulley of dismouting is very convenient.
Further, the first fixed pulley 10 and the second fixed pulley 20 are driven by a synchronous belt.
The utility model discloses an in the embodiment, synchronous belt drive's drive ratio scope is big, compact structure to can not have high expectations to operational environment, can adapt to multiple abominable operational environment. And the synchronous belt transmission is convenient to maintain and has low running cost.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. The utility model provides a fatigue strength testing arrangement, its characterized in that includes synchronous pivoted first tight pulley and second tight pulley, first tight pulley is provided with the gear, gear and rack toothing, the slider fixed connection of rack and slider-crank mechanism, first tight pulley with be provided with the certain distance between the second tight pulley, first tight pulley with the second tight pulley height is the same, still includes the motor, the one-way drive of motor slider-crank mechanism motion, slider-crank mechanism drives rack reciprocating motion.
2. The fatigue strength testing device of claim 1, comprising a first fixing frame, wherein a guide rail is fixedly connected to the first fixing frame, and the sliding block is in sliding fit with the guide rail.
3. The fatigue strength testing device of claim 2, wherein the slider-crank mechanism comprises a rotating wheel, the rotating wheel is rotatably connected with a connecting rod, the connecting rod is rotatably connected with the slider, and the first fixing frame is rotatably connected with the rotating wheel.
4. A fatigue strength testing device according to claim 2, wherein the rack is fixed to a side of the slider facing away from the rail.
5. The fatigue strength testing device of claim 1, wherein the first fixed pulley has a first steel wire rope detachably and fixedly connected to the wheel groove, and the second fixed pulley has a second steel wire rope detachably and fixedly connected to the wheel groove.
6. The fatigue strength testing device of claim 5, wherein a first fastening bolt is screwed into a wheel groove of the first fixed wheel, the first fastening bolt is clamped with one end of the first steel wire rope, a second fastening bolt is screwed into a wheel groove of the second fixed wheel, and the second fastening bolt is clamped with one end of the second steel wire rope.
7. The fatigue strength testing device of claim 1, wherein a first pulley is disposed under the first fixed pulley, and a vertical projection of the first pulley and the first fixed pulley has an overlapping portion, and a second pulley is disposed under the second fixed pulley, and a vertical projection of the second pulley and the second fixed pulley has an overlapping portion.
8. A fatigue strength testing device according to claim 7, wherein a third pulley is provided below the first pulley, vertical projections of the first pulley and the third pulley have an overlapping portion, a fourth pulley is provided below the second pulley, and vertical projections of the second pulley and the fourth pulley have an overlapping portion.
9. The fatigue strength testing device of claim 8, comprising a second fixing frame, wherein the second fixing frame is provided with a plurality of fixing holes, the plurality of fixing holes are different from the third pulley in distance, and the fourth pulley is detachably and fixedly connected with the fixing holes.
10. The fatigue strength testing device of claim 1, wherein the first fixed sheave and the second fixed sheave are driven by a synchronous belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821248361.8U CN211234922U (en) | 2018-08-03 | 2018-08-03 | Fatigue strength testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821248361.8U CN211234922U (en) | 2018-08-03 | 2018-08-03 | Fatigue strength testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211234922U true CN211234922U (en) | 2020-08-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821248361.8U Active CN211234922U (en) | 2018-08-03 | 2018-08-03 | Fatigue strength testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211234922U (en) |
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2018
- 2018-08-03 CN CN201821248361.8U patent/CN211234922U/en active Active
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